Disk harrow



. W. L. PAUL DISK HARRow Dec. I6, 1930;

Original F'ile Nov. 15,L 1925 4 Sheets-Sham, 1

Dec, 16, 1930. w. PAUL 1,785,144

DISK 'HARRow Original Fled Nov. 15, 1925 4 Sheets-Sheet. 2

NN www N Nra Lz/crimini" Zi WML 717- a@ El {Urn/5 U.

4 Sheets-Sheet 3 A v 4 Sw ,nm i Nm. N) NNQ \N\ w. l., PAUL DISK HARROW Dec. 16, 1930.

Original Filed Nov.

W. L. PAUL DISK HARROW Dec. 1e, 1930.

1 Sheets-Sheet 4 Original Filed Nov. 13, 1925 EMUFHE U..

Patented Dec. 16, 1930 UNITED STATES `WILLIAM L. PAULOF BERKELEY, CALIFORNIA, ASSIGNOR TO DEEREAND- COMPANY, l

PATENT olrricr.

or Morane, Ymentors, A conronnrron on rLLINoIs DISK HARROW Application filed November 13, 1925, Serial No.'68,8375\. Renewed, October 3, 1929.

My invention relates to disk harrows designed to be drawn by a tractor, and has particularly to do with the provision ot `means by which the power of the` tractor may be utilized in varying the angular position of the disk gangs. accomplished in various Ways, as for example by backing the tractor and the harrow along with it, to straighten the gangs, or by mechanism actuated by the forward movement of the harrow. While the prior devices have been measurably successful, certain conditions are often encountered in the use of such implements in which they do not operate satistactorily, as for instance, where the tractor has mired so that it is unable to move the load in addition to its own weight.

he object of my invention is to provide an improved construction by which` both the l angling and the straightening of the `gangs may be accomplished by torwardmovement oi the tractor relatively to the harrow frame and the dish gangs connected therewith, so that the worlr may be performed without the necessity of moving the harrow along with the tractor. Consequently, it' the tractor should be mired it has only its own weight to move, and is, therefore, more apt to eX- tricate itself. My invention also contemplatesv the backing oithe tractor relatively to the harrow as the iirst step in the operation of varying the angular position of the gangs, by which operation it operates to roll down any soit spot by which it may have been stalled, thereby providing a firmer path for it to traverse in going ahead again, which usually will enable it to haul the harrow over the soit spot, especiallyv it the gangs have been straightenechor have been set at a reduced angle. l accomplish my objects as illustrated in the accom aan ino dranvin'sv .1. l f sition, with the har-row coupled to a tractor;

Hereteiore this has been Fig. 8 is a longitudinal vertical section on line 83 of Fig. 1 showing the parts in the position they occupy after the tractor` has been backed and jnstbefore it is advanced to change the angle of thedisk gangs;

Fig. 4 is a vertical cross-section online 4-4 of Fig. 6; l Fig. 5is a side elevation, some parts being in` section, showing the position of the parts` when the gangs are in transport position;

Fig. 6 is a horizontal section on line 6`6 of Fig. 3,3' j

Fig. 7` is avertical cross-section 'on line 7-7ofFig.5;`` i

Fig. 8 is a view similar to Fig. 5 showing the parts in theposition they occupy when the gangs are angled tothe fullest extent;

Fig. 9 is an enlarged detail showing a combined gear and ratchet wheel and a disk which constitute part of thegang shifting .iechanism; and l Fig. 10 is a section on line 10-10 of Fig. 9.

Referring to the drawings,-11 indicates allel members 21, 22 which extend forward from the central portion oi thef member at opposite sides oi the median line of the barrow and are braced by braces 23, 24, re-

spectively. v The members 20, 21, 22, 23 and 2-1 are preferably steel bars rectangular in. crossesection. At `or near their forward ends the bars 21 22 carry a bracket comprising side plates 25, 26A secured to the said bars, said side plates being connected by a transverse plate 27 that is disposed transversely nnder the bars 21, 22, as best shown in Fig. 4. Said plate 27 is provided with two openings 28, 29 for Vthe reception of guide bars 30, 31 which serve the cansethe gangs to travel in a horizontal plane and also to connect theinner ends of CTL the disk gangs with the angling devices, as will be hereinafter more fully explained.

Supported on said bracket above the plate 27 to slide longitudinally of the harrow is a draft bar 32 which at its front end is connected with the clevis 13 by al horizontal pivot 33, as shown in Fig. 1. `The side margins of said draft bar lie between the bars 21, 22 and shoulders 34, 35 on the bracket above mentioned `above the plate 27, as shown in Fig. 4, so that said draft bar is guided by the bracket as it moves fore and aft. The draft bar 32 is provided at its upper side with a longitudinally extending rack bar 36, as best shown in Figs. 4 and 6.

As shown in Fig. 1, the rear ends of the guide bars 30, 31 are connected with the inner end portions of the disk gangs 14, 15, respectively, by pivots 37, 38, so that fore and aft movement of said guide bars operates to swing the gangs about the pivots 16, 17, thereby changing their angular relation to the line of draft. Pivotally connected with the rear portions of said bars 30, 31, respectively, by pivots 39, 4() are links 41, 42, which extend forward between said bars and at their forward ends are connected by a pivot 43 with the lower end of a link 44 arranged to swing fore and aft in a vertical plane. The upper end of the link 44 is connected by a pivot 45 with an arm 46 that depends from a lever 47 fulcrumed at 43 on the machine frame, preferably by means of a bracket 49, as shown in Fig. 5. The lever 47 is provided with the usual latch 50 which engages with the notches of a sector 51 also mounted on the bracket 49. It will be apparent, therefore, that by swinging the lever 47 up or down the link 44 will be moved vertically, thereby swinging the forward ends of the links 41, 42 up or down. The pivot 43 extends through an arcuate slot 52 in a yoke 53 which is pivoted at its upper end to the sector 51, or some other fixed part of the frame, by a pivot 54, as shown in Fig. 5. The lower end of the yoke 53 may, therefore, swing fore and aft, carrying with it the pivot 43 and consequently moving the links 41, 42 endwise. This movement is, of course, communicated to the guide bars 30, 31, and through them is transmitted to the inner ends of the disk gangs. It will be evident, therefore, that by swinging the yoke 53 in the manner described the angular position of the gangs may be adjusted, and that by moving the link 44 vertically to move the pivot 43 vertically in the slot 52, the extent to which the gangswill be adjusted by a given movement of the yoke 53 may be varied. The arcuate slot 52 is curved in the arc of a circle of which the pivots 39, 40 of the links 41, 42 are at the center when the gangs are alined, that is, when the yoke 53 is in its forwardmost position. Thus, regardless of the position of the pivot 43 in the slot 52, the forward movement of the yoke brings the gangs to their alined or transport position. Consequently when the gangs are alined with each other, which is the position shown in Fig. 5, the lever 47 may be actuated to adjust the position of the pivot 53 without altering the position of the gangs, but when the gangs are angled, actuation of the lever 47 alters their position to some extent.

Provision is made for swinging the yoke 53 fore and aft by the power of the tractor to vary the angular position of the gangs, and the devices by which that is accomplished will now be explained. Referring particularly to Figures 5, 9 and 10, it will be seen that a pitman 55 is pivotally connected at its rear end by a pivot 56 with the yoke 53, forward end being connected by a wrist pin 57 with an arm 53 extending radially beyond the periphery of a disk 59 which is jonrnaled on a transverse shaft 60 carried by a bracket 61 which rises from the forward portion of the harrow frame. Mounted concentrically with the disk 59 on the shaft 60 is a conn bined gear and ratchet wheel 62 recessed at one aide to receive the disk 59, and. provided with suitable clutch mechanism by which rotation of said wheel in one direction will cause corresponding rotation of the disk 59, whereas said wheel may rotate in the opposite direction independently of said disk. For this purpose preferably said wheei is provided with intern al ratchetteeth 63 which overlie the periphery of said disk, best shown in Fig. 10. On its periphery wheel 62 is provided with gear teeth 64 which pref erably extend only part way around said wheel, as best shown in Fig. 9. A pawi 65 pivotally mounted on the disk by means of a pivot 66 and is normally held in engagementwith the ratchet teeth 63 by a spring 67. The arrangement is such that the wheel 62 may rotate counterelockwise as viewed in Fig. 9 independently of the disk but when said wheel rotates clocl'wise the disk 59 rotates with it. The dis: a9 is provided with a second arm 68 which projects radiali?.v therefrom at a point approximately opposite the arm 53. The arm 63 carries a rounded head or roller 69 at one side thereof, and the outer end of the arm 53 is also rounded so that it also forms a head 70 similar to the head or roller 69. The parts 69, 76 ari laptv ed to engage in a round'ed notch 71 provideifl in the lower end. of a trip lever 72 which is fulcrumed on the barrow frame by pivot 73, preferably by means of a bracket 7 4 rising' from the frame, as shown in Fi( The lower end of said lever is yieldingly held in proximity to the wheel 62 by means of a spring 75 interposed between the lower end of said lever and a lug 76 carried. by the bracket 74, as best shown in'Fig. V3; As

1show-n in Figs. 1, 3 and 5, the rack bal 36 arranged to move longitudinally of the inachine under the wheel52, with the teeth of in@ luc' 77 which is ada ted to engage the.

D LD 2') P1 rear margin of a bottom plate 7 8 that connects the side members 21,22 of thejbracket` by which said draft-bar is supported, thereby `imi ino e .orwarc l vemento'saic di l t gth f lino j vf l 111art bar and transmitting the forceV of the draft to the harrow `frame through jsald bracket.

Normally said draft bar stands inthe position shown in Fig. 5, at which time it is at the forward limit of its movement with the lug 77 in engagement with the` rear margin of the bottom plate 7 8, The otherpartsare" also then in the position' shown in F1g.15, the `head 70 being in engagement with the notch 71 of the t-rip` lever 7 2, the lower endof said lever `lying in the path of the draft bar opposite the rear end thereof, as shown at 79 in said figure. At that time the pitman 55 isin practically dead'center position, since the pivots 5,6 and 57 `are in line with the axis of the disk 59 and wheel 62, and the lever 72 being pressed by the spring 7 5 veffectively holds the gangs" in eitherv their angled or their transport position. Y

With the parts in the position shown! in Fig. 5, the harrow may `be drawn forward with the gangs in transport position, draft being transmitted to the harrow frame through thelug 77 as above stated. If it be desired to angle the gangs, this may be doneV by pulling forward on the upper end 'of the trip lever 72, which for that purpose is. preferably provided with a rope or cable 8O ex- 1' `tending to the tractor. Vhen the trip lever 72 is so actuated its lower end is swung rear-A wardly to release the head 70 from the notchY 7l and permit the disk 59 to rotate. A spring 81, one end of ywhich is connected with i the' pitman 55 and the other vend with the upper portion of the yoke 53,'tends to swing the forwardV end of said'pitman upward, and consequently to rotatethe disk 59 in a clockwise direction. Therefore, when the disk is 'Y `released by the tripping Aof the lever 72 as above described, the forward 'movement of the implement will causethe gangs to angle, since their inner endswill be held back by friction with the soil while their -outer ends will be drawn forward. In this angling operas the diskk 59. makes.v a half revolution, at

which time )the roller or head 69 will be caught in the notch 71 'of the leven72, therby preventing further rotation of said disk. As the gangs are angled the guide bars 3,0, 31 move endwisey in a rearward direction,` their forward endsbeing guided by the plate 27, while their rear ends 4are guided by rollers 8 2., Smoulltd on the frame-of the barrow, asbest shown inFigs. 1 and. Theserollers bear onthe upper'margins of said guide bars andcooperate with the plate 2 7 to cause. the gangs tok maintain theirhorizontal position.

-Tlieextent to which the gangs areangled may` be` regulated vby `operating thelever 47 to, raise or lower the link 44 with reference to theyoke, thereby moving the pivot 43 `toward or from the pivot 54 about which said yoke swings. Obviously when the pivot. 43

is at,l its extreme distance from the pivot 54 the stroke of the links 41, 42 will be greatest and the gangs willbe angled to the fullestextent, and by moving the pivot- 43 closer tothe `pivot 54A the stroke of said links will be reduced in length andthe gangs will `consequently'be angledto aglessextent. Y

, If, instead of angling the gangs by the forward travel of the harrow, it be desired to eifect such angling by the power of the tractor independently of movement of thekharrow frame, this may be donerby iirst backing." the tractor to move the draft bar82 rearwardly to the position shown in Fig. 3. This 1 rotates the gear wheel 62in acounterclockwise direction and at` the same. time the en gagement of the rear end of the draft bar 32 with the lower end of the trip lever 72 will move such lower end rearwardly thereby disengaging it from the head 69 as shown in Figure 3. By `then advancing the tractor the draft bar 32 will rotate the gear wheelA V 62 in a'clockwise direction, rotating the disk 59 in the same direction by reason of the ratchet connection betweensaid'disc andthe wheel 62. This will posi-tively movethe pitman 55 rearwardly, thereby forcing thelnks 41, 42 and the `guide bars 30, 31 in the same direction, which moves the inner ends of the` gangs backward. When the. disc 59 has made a half revolution it will be locked by the trip lever 72 in the manner above described. In like manner the gangs may be straightened `by first backing the tractor to rotate the `wheel 62 counterclockwise and then advancing the tractor to rotate the disk 59 through the second half of its cycle, which will move the itman 55 forward and restorethe parts to the position shown in Fig. 5. y y

It is believed that it will be clear from 'the foregoing description that by the construction described the gangs may bel angled or straightened by forward movement of the tractor independently of the harrow proper, these operations being performed alternately also that the gangs may be angled by for- Ward movement of the harrow along with the tractor. If, therefore, the tractor should become mired with the gangs in their angled position, by backing the tractor it will roll down the earth, thereby hardening it so th at on the succeeding forward movement of the tractor it will advance overhardened earth and at the same time will straighten the gangs so that they will offer less resistance, thereby enabling the tractor to extricate itself.

If it be desired to vary the extent to which the gangs are angled, this may be accom plished by adjusting the position of the lever 47 to raise or lower the pivot 43 with respect to the yoke 53, as has been described.

lVhile I have shown my invention as applied to a harrow comprising only two disk gangs obviously it may also be applied to tandem disk harrows. I wish it to be understood, further, that While have described specifically the construction illustrated in the drawings, my invention is not limited to that particular construction, but includes such variations or modifications as would occur to those skilled in the art. The claims hereinafter made are therefore to be construed accordingly. f

lVhat I claim my invention and desire to secure by Letters Patent, is-

1. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the harrow frame, and means comprising rotary clutch controlled devices actuated by movement of said draft member to adjust the angular position of the gangs.

2. A gang shifting mechanism for disk liarrows, comprising a draft member movable rearwardly independcntly of the and means comprising rotary clutch controlled devices actuated by forward movement of said draft member to shift the gangs angular-ly in either direction.

3. A gang shifting mechanism for disk harrows, comprising a draft member niovable fore and aft relatively to the l frame, and rotary means constantly in. operative connection wit i and actuated by alternate forward movements of said draft nicmber to alternately angle and straighten the gangs.

4. A gang shifting machanism for disk harrows, comprising a draft member movable fore and aft relatively to the h frame, and means comprising rotary rat mechanism in constant engagement with, and actuated by said draft member to vary the angular position of the gangs in either direction.

5. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the barrow frame, a pitman connected with the gangs and operable to change the angular position thereof, and rotatable means actuated in a constant direction by fore and aft movement of said draftv member relativelyto the harrow frame for actuating said pitman.

G. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the harrow frame, a pitman connected with the gangs and operable to change the angular position thereof by forward. :pulling movement and rearward thrusting movement, and rotary clutch mechanism actuated by fore and aft movement of said draft member relatively to the harrow frame for actuating said pitman.

7. A shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the l. arrow frame, a pitman connected with the gangs and operable to change the angular position thereof, and rotary ratchet devices operatively connected with said draft member and actuated to operate said pitman by forward movement only of said draft member relatively to the harrow frame.

8. A shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the harrow frame, a pit-man connected with the gangs and operable to change the angular position thereof, and rotary means having constant operative connection with said draft member and actuated by forward movement only thereof relatively to the harrow frame to operate said pitman.

9. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the barrow frame, a pitman connected with the gangs and operable to change the angular position thereof, and rotary clutch mechanism actuated by forward movement only of the draft member relatively to the barrow frame to pull said pitman forwardly or to thrust the same rearwardly.

l0. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the harrow frame, a rotary member mounted on the barrow frame, means actuated by the rotation of said rotary member in a constant direction for adjusting the angular position of the gangs in either direction, and means actuated by movement of said draft member to rotate said rotary member.

ll. A gang shifting mechanism for disk harrows, comprising adraft member movable fore and aft relatively to the harrow frame, a rotary disk mounted on the barrow frame, means actuated by partial rotation of said disk for shifting the gangs in one direction and by further rotation of said disk in the same direction to shift the gangs in the im opposite direction, and means for rotating saiddisk by movement of said draft member.

l2. A gang shifting 4mechanism for disk harrotvs, comprising a draft member movable fore and aft relatively to the barrow frame, a rotary member mounted on theharrow frame, means actuated by the rotation of said rotary member in a constant direction fcradjusting the angular position of the gangs in either direction, and means actuated by movement of said draft member in one direction only to rotate said rotary member. l

13. A gang saifting mechanism lfor disk harrovvs, comprising draft member movable fore and aft relatively to the` barrow frame, a rotary member mounted on the harrovv frame, means actuated by the rotation of said rotary member in a constant direction for adjusting the angular position of the gangs in either direction, and means actuated by forward movement only of said draft member/to rotate said rotary member.

14.` A gang shifting mechanism for. disk h arrovvs, comprising a draft member movable fore and aft relatively to the barrow frame, a pitman connected vvith the gangs and operable tol change the angular position thereof, and` rotatable ratchet devices actuated by forward-movement only of the draft member relatively to the barrow frame ta actuate said pitrnan.

1,5. A gang shifting mechanism for disk narrows, comprising a draft member movable fore. and aft relatively to the hallTQW frame and having a rack thereon, agear meshing With said rack, a disk,` ratchet mechanismfor driving said disk from said gear, and means actuated bythe rotation of said disk for changing the angular position of the gangs.

116,.` A gang shifting mechanism for, disk harrovvs, comprising a draft member movable fore and aft relatively tothe barrow frame and having a rackthereon, a gear meshing with said rack, adisk, ratchet mechanism for driving said disk fromv saidv gear, and means actuated by partial rotation of said disk for shifting the gangs in one direction, and byr further-rotation of said disk inthe ,same directionv to shiftthe gangs inlr the opposite direction j,

17. A gang shifting mechanism for disk harroWs, comprising a draft member movable fore and aft relatively to the harrov7 frame and having a rack thereon, a gear meshing with said rack, a disk, ratchet mechanism for driving saidv disk from said gear, anda pitman actuated by said. disk and connected with the gangs for adjusting their angular position. Y

18. A gang shifting mechanism for disk. harrovvs, comprising a draft member mov able relatively to the harrovv frame by for- Ward and backward movement of the tractor relative to the barrow frame, means com-` member.

prising' clutch controlled devices actuated by movementof said draft member for. arl-. justmg the, angular position of the, gangs,

and means operablev to, vary the. angular-` trolled devices actuatedfby forward movement ofrsaid draft member to adjust the angular position of the gangs, andmeans. operable to vary the `adjustment of said gangs effected by a given movement of said draft 20. A gang shifting mechanism for disk harrovvs, comprising-a draft memberfmovable relatively to4 the` harrovv frame by for- Ward and backward movement of the tractor relatively to the barrow frame, means comprising clutch controlled devices actuatedby movement ofsaid draftmember for adjusting the angular position of the gangs, and means operable to vary the angular move; ment in either directionl of said gangs; efr-ectd by a given movement Ot Said draft mehr.

2l. A gang shifting mechanism for. disk harrows, comprising a draft-member reciprocable relatively to the barrow frame and through whichthe 4draft is transmitted V,to

said frame, means comprising clutch con-f trolled devices actuated by forward movement of said draft member to adjust the angular position ofthe gangs, and means operable to vary the adjustment in eitherdiretorl 0f Sai gangs' eected by a vaire-I1. movement of said draft member. f

A-.gang shifting mechanism `for harrovvs comprisinga draft member movable relatively to the harrovv framez devices actuated by movement `df said draftmember for adjusting the angular; position ofA the gangs, allever mounted'on the harrow frame, and means operated by said lever for gov:l erning the extentl of movement of said `devices effected by a given movement of said draft member.` j

23.' In a gang shifting mechanism for harrows, the combination of a draft mem;y ber movable relatively to the barrow frame, and devices actuated` by movement'of draft memberfor adjusting the angular pq: sition of the gangs lcomprising a member pivoted to swing fore and aft and actuated byfsaiddraft member, and links connected with the disk gangs and actuated by swinging member to adjustV the angular. position of the gangs, said links being adjustable toward and from the pivot of said swinging member-to vary the angular movement of the gangs effected by a given movement of said draft member;

24;. In a gang shifting mechanism for disk harrows, the combination of a draft member movable relatively to the harrow frame` and devices actuated by movement of said draft member for adjusting the angular position of the gangs comprising a member pivoted to swing fore and aft and actuated by said draft member, and links connected with the disk gangs and actuated by said swinging member to adjust the angular position of the gangs, said links being adjustable toward and from the pivot of said swinging member to vary the angular movement of the gangs effected by a given movement of said draft member, and a lever mounted on the barrow frame and operable to adjust the position of said links with reference to said swinging member.

25. In a gang shifting mechanism for disk harrows, the combination of a draft member movable relatively to the barrow frame, and devices actuated by movement of said draft member for adjusting the angular position of the gangs comprising a yoke pivoted on the harrow frame to swing fore and aft and actuated by movement of said draft member, said yoke having an arcuate slot, links connected with the disk gangs and having a connection extending through said slot, and means mount-ed on the barrow frame and operable to move said links toward and from the pivot of said yoke to vary the angular movement of the gangs effected by a given movement of the draft member.

26. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the barrow frame, and connecting means between said' member and gangs and operable upon fore and aft movement of the draft member to shift said gangs to and from transport position, said connecting means including adjustable means for varying the Yangular movement of the gangs effected by a given movement of the draft member.

27. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the barrow frame, connecting means between said member and gangs and operable upon fore and aft movement of the draft member to shift saidV gan gs to and from transport position, said connecting means including adjustable means for varying the angular movement of the gangs effected by a given movement of the draft member, and releasable means to lock said gangs in shifted position.

28. A gang shifting mechanism for disk harrows. comprising a draft member movable fore and aft relatively to the harrow frame. connecting means between said member and gangs and operable upon fore and aft movement of the draft member to shift said gangs to and from transport position, said connectmg means including adjustable means for varying the angular movement of the gangs effected by a given movement of the draft member, and releasable means to lock said gangs in shifted position, means for releasing the locking means upon backward movement of said draft member.

29. A gang shifting mechanism for disk harrows, comprising a draft member movable fore and aft relatively to the barrow frame, means comprising clutch controlled devices actuated by movement of said draft member for moving said gangs of disks to and from transport position, adjustable means operable to vary the angular movement of said gangs effected by a given movement of the draft member, said first mentioned means bringing said gangs to the same transport position regardless of the position of said adjustable means.

30. In a gang shifting mechanism for disk harrows, the combination of a draft member movable relatively to the barrow frame, and devices actuated by movement of said draft member for adjusting the angiilar position of the gangs comprising a yoke pivoted on the barrow frame to swing fore and aft and actuated by movement of said draft member, said yoke having an arcuate slot, links connected with the disk gangs and having a connection extending through said slot, and means mounted on the harrow frame and operable to move said links toward and from the pivot of said yoke to vary the angular movement of the gangs effected by a given movement of the draft member, said links being so pivoted, relative to the yoke, that when the yoke is in its forward position the pivot of said links substantially coincides with the center of said arcuate slot, whereby forward movement of the yoke brings the gangs to the same position irrespective of the position of said last mentioned means.

31. A gang shifting mechanism for disk harrows, comprising a draft member movable relatively to the harrow frame, means including rotary clutch controlled devices actuated by movement of said draft member to adjust the angular position of the gangs, and means to lock said gangs in adjusted position, said means being released upon movement in one direction of said draft member relatively to the harrow frame.

A gang shifting mechanism for disk harrows, comprising a draft member movable relatively to the harrow frame and through which the draft is transmitted to said frame. means ii cluding clutch controlled devices actuated bv movement of said draft member to adjust the angular position of the gangs, means operable to vary the adjustment `of said gang effected by a given movement, and means to hold said gangs in adjusted position.

A gang shifting mechanism for disk harrows, comprising a draft member movmai-iin able relatively to the barrow frame and` through which the draft is transmitted to said frame, means including clutch controlled devices actuated by movement of said draft member to adjust the angular position of the gangs, means operable to vary the adjustment of said gang effected by a given movement, and means to hold said gangs in adjusted position, said means being released upon backward movement of said draft member.

34. A gang shifting mechanism for implements, comprising a draft member movable relatively to the frame of the implement, half-revolution clutch means actuated by relative movement of said draft member, releasable locking means to maintain said draft member in draft transmitting relation to said frame, and connecting means between said clutchnieaiis'and the implements, whereby when the locking means is released said iinplemcnts are shifted. Y

35. A gang shifting mechanism for dislf: harrows, comprising a draftv member movable relativeto the frame of the implement,

half revolution clutch means actuated by relative movement of said draft member, releasable locking means to maintain said kdraft member in draft transmitting relation to said frame, connecting means between said clutch means and said gangs whereby when the loci*- ing means is released said gang means are shifted, said locking means being released by Y relative movement of said draft member in one direction.

36.'A gang shifting mechanism for 'disk liarrows, comprising a draft member movable fore and aft relatively to the harrow frame, connecting` means between said member and said gangs operable upon-fore and aft movement of said member toshift said te and from transport position, said connecting means including an adjustable part for varying the movement of the gan e's effetedby given movement of the draft member, andY means for adjusting said part. 37. A gang shifting mechanism for disk harrows, comprising draft member movable fore and aft relatively to the barrow frame, connecting Vmeans between said member and said gangs operable upon fore and aft movement of said member to shift saidV gangs to and from transport position, said connecting means including a member movable to a fixed position when thevdraft member is moved in one direction and adjustable link means Vconnecting the movable member with'the gangs,

vmoved to a given'position independently o said link means connected to said movable member so that when the movable member is movedto its fixed position the gs the adjustment of said link means. i

38A gang shifting ,mechanism for cisl-rv liarrows, comprising a draft member movable fore and aft relatively to the barrow frame connecting means between said member and said gangs operable upon fore andaft miovement of said member to shift said gangs to? and from tra-iisportposition, and releasabl'e means to lock said gangs l'in shifted posi-tion.

B9.` A gang shifting mechanismxfordisk harrows, comprising adra-ft member movable with respect tothe barrow hama-connecting' i means between the member-andrsaid gangs relatively thereto to-'andf fromv inoperative position, a Vdraft member movable'. fore and aft on, the frame and between fixed limits,

connections between they memberand gangs `-iii-cliiding a *pair of adjustable members adapted to vary the rangeA ofA movement 'of said gangs effected by said"V member, and means to iiX .the inoperativei'position ofsaid gangs. i

il. A' disk harrow comprising, in combination, a frame, gangs shiftable on the fiame t0` and from a fixed transport position, afdraft member movable fore and aft on the fra-me, operating connections between said member and the gangs whereby movement of the member shifts the gangs, and means in said connections to vary the amount of movement of l the gangs from their fixed position effected by a given movement of said draft member.

Y 42, A disk harrow Comprising, in combination, a frame, gangs shitable on the frame to and from a fixed transport position, a draft member movable fore and aft on the frame, operating connections between saidV member and the gangs whereby Vmovement l of t-he member shifts the gangs, said connections including a slotted member and means having a portion operating in said slot to vary the amount of movement of the gangs from their fixed position effected by a given movement of said draft member.

i 43. A disk harrow comprising, in combination, a frame, a plurality of gangs shiftable relatively thereto to and from inoperative position, a draft member movable fore and aft on the frame, and connections betweenthe gangs and said member whereby movementV of one effects movement of the other, said connections including a member movable in 'an arcuate path and a second member adjustably connected to the first member for varying the movement of the gangs effected by a given movement of the draft member by moving inapathnwhich eX- tended'intersects said' first path. i j

t. A disk harrow comprising, in combination, a frame, a plurality of gangs shiftablerelatively thereto to and from inoperaioo izo

tive position, a draft member movable fore and aft on the frame, and connections between the gangs and said membeil whereby movement of one effects movement of the other, said connections including a member movable in an arcuate path and a second member movably connected to the gangs and to the first member to move With respect thereto in a path equidistant fromgthe gangs in one of their shifted positions.

45. A disk harrow comprising in combination, a frame, a plurality of gangs shiftable relatively thereto to and from inoperative position, a draft member movable fore 1 5 and aft on the frame, connections between the gangs and said member whereby movement of one effects movement of the other, said connections including a member movable in an arcuate path and a second member 20 pivoted to the gangs and movably connected with the first member to move relatively thereto in a path which is equidistantfrom the point of pivotal connection of the second member with the gangs in one position, and 25 means to adjust said members.

WILLIAM L. PAUL. 

